JPS63120968A - Ball valve with service port - Google Patents

Abstract

PURPOSE:To carry out the filling of fluid, the measurement of pressure, or the like, by engaging the T-shaped through holes formed in a ball with an outflow passage, a service port flow passage, and the bottom wall, by turning a stem approximately 180 degrees from an open condition. CONSTITUTION:In a housing chamber 1f of a T-shaped valve box 1, both ends of which are made to be an inflow passage 4a and a service port 1b having a service port flow passage 1c respectively, and the remaining upper end is made to be an outflow passage 1a, a bell 5 having T-shaped through holes 5a is housed. In a front-scat condition in which an inflow passage 4a is closed by the ball 5 by turning a stem 2 approximately 180 degrees and further an outflow passage 1a and the service port flow passage 1c are opened, the filling of fluid, the measurement of pressure, leak test, air purge, or the like are carried out from the service port.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a ball valve with a service port that allows fluid filling, pressure measurement, etc. to be performed at the service port.

``Prior art'' Conventionally, for example, there have been market valves with service ports in refrigerant piping systems, but typical packed valves are
This will be explained using figures.

The inlet passage 104a and the outlet passage 101a are connected to the valve box 101 through hole 1.
The speaker 101g communicates with the service port channel 101c that communicates with the service port 101b in a stepped manner.
8a and a corner portion 118b for rotation at the other end, the service port 101b side valve box is inserted into the valve box 1 by screwing the valve stem 118 with a seal 106 for preventing leakage.
01, and are integrated by brazing while cooling to prevent heat deformation. Then, the hole 101g was sealed on the foot 17 side of the valve 118a to make the inlet passage 104a 1", and the outlet passage 101a and the service port passage 101c were left open. It is a so-called front seat (refrigerant filling, pressure measurement, leakage test, air purge, etc. are performed at the service port), and the corner 118b is rotated to seal the hole 101h on the back side of the valve 118a to open the service port. The flow path 101C is kept quiet, and the inlet path 104a and the outlet path 101a are open, which is a so-called back sheet (compressor normal operating state R), and the inlet path is located between the front seat and the back seat. 10
4a, the outlet path 101a, and the service port flow path 101C are opened as a so-called intermediate sheet (which may also be used to seal refrigerant, measure pressure, etc.), and to prevent double leakage of refrigerant when back sheeting. The service port 101b is screwed and sealed with a flare nut 109 with a cap 108 interposed, and the corner 118b (II) is also screwed and sealed with a seal cap 111 with a gas get interposed.However, this valve stem In the type packed valve, the inlet passage 104a and the outlet passage 101a are stepped with holes 101g.For example, 1. When Freon is used as a refrigerant, its specific gravity is heavier than water, so the flow resistance of the pipe is large;
Recent energy saving refrigeration 1? ! This was a major bottleneck in '3. Also, the valve stem 118 had to be rotated several times to open the valve 118a.

Therefore, a ball valve with a valve core as shown in FIG. 9 has been used in large-scale refrigeration equipment, which is highly effective, so this will be explained.

A ball 105 having a straight through hole 105a is held between seat rings 103 and 103 in a valve box 101 having an inlet passage 104a and an outlet passage 101a, and a steel tube 10
7 was attached with a body cap 104 having an introduction path 104a without brazing. Then, the derived path 10ta(i
A cylindrical body 116 is clearly attached to one part of the valve box 101 by brazing, a valve core 115 used in -i for the air inlet of an automobile tire is attached, and a core cap 11 is attached.
7 is screwed on. A hole 10 penetrating one side wall of the ball 105 to be engaged and moved by the stem 102 is provided.
5c is provided to allow dead water to flow out of the storage chamber 101f when the valve is closed. Refrigerant filling, pressure measurement, etc. were performed by removing the core cap 117 and screwing in a dedicated connection device that pushed down the tip of the valve core 115. Note that opening m of the flow path by the ball 105 can be performed independently and arbitrarily.

[Problems to be solved by the invention] However, such conventional valves had the following drawbacks. First, in the valve stem-type packed valve shown in Figure 10, as mentioned above, the flow path is stepped, and the resistance of the pipe during temperature is large, resulting in a large pressure loss in the fluid pipe. Therefore, a larger compressor is required, which increases power consumption and becomes a major bottleneck in energy saving.Next, in the ball valve with a valve core shown in No. 91A, the slanted outlet of the valve core 115 is Part 18 was longer and the valve box 101 was also larger. Furthermore, since the flow path of the valve core 115 is small, the refrigerant filling speed is slow, and furthermore, it is necessary to prepare a filling device with a dedicated filling port. Also, unlike the packed valve, it did not have three positions: front seat, middle seat, and back seat.

In any conventional example, due to brazing,
Each seal part was deformed and leaked easily, and additional processes such as water washing and pickling were required after brazing.

The present invention was devised in view of the above points.
The purpose of the present invention is to provide a small ball valve with a service port that can be used as a front seat, a middle seat, or a back seat.

Means for Solving Problems" Means for solving the problems described above will be explained below using FIGS. 1 to 8 corresponding to the embodiments.

A ball having a T-shaped through hole 5a in the storage chamber 1f of the valve N1, which has a service port 1b having an inlet passage 4a and a service port passage 1c at both T-shaped ends, and an outlet passage 1a at the remaining upper end. 5, the through hole 5a is the introduction path 4
a, the lead-out path 1a, and the bottom wall at the lower end are engaged in the open state, and the stem 2 is clamped and mounted with the seat ring 3.3 and engaged with one of the side walls of the ball 5, and the stem 2 is rotated approximately 180 degrees. , the through hole 5a connects the outlet path 1a and the service port I/flow path 1.
c and the bottom wall, and the introduction path 4a is in the 4 state.

"action" The inlet path 4a side and the outlet path la side are each connected by piping.

Then, the stem 2 is rotated to set the service port channel 1c to 121 with the ball 5, and the inlet channel 4a and the outlet channel 1a are
It is usually used in an open, so-called back sheet state. Then, rotate the stem 2 and insert the ball 5 into the introduction path 4.
a is left blank, and the outlet path 1a and the service port flow path 1
C means open, so-called b, where fluid filling, pressure measurement, leakage test, air purge, etc. are performed from the service port in the front seat state, and an inlet path 4a and an outlet path between the front seat and the back seat. 1a and the service port flow path 1c were opened. Fluid sealing, pressure measurement, etc. may be performed in a so-called intermediate sheet state. In addition, when performing pressure measurement, leakage test, air purge, etc., the connection of the device is performed using the back sheet type 3.

This will be explained in more detail below. 4 to 6 are schematic partial views of FIG. 1, showing a front seat, an intermediate seat, and a back seat. It is assumed that the stem 2 is on the front side. Figure 4 shows a backseat state in which only the service port flow path 1c is open, the inlet path 4a and the fourth outlet path 1a, including the storage chamber If, are open, and the fifth
The figure shows the state of the intermediate seat between all the flow paths, and in Figure 6 of the hour hand clock, which is approximately 180 degrees from Figure 4, only the introduction path 4a is open, and the rest of the flow paths, including the storage room 1f, are open. Indicates the condition.

In addition, when opening the field counterclockwise, it is in the back seat state as in Fig. 4, and when the field is opened counterclockwise by approximately 90 degrees, the opening on the side of the lead-out path la in the upper direction of the through hole 5a in Fig. 5 is directed downward. However, through the storage chamber 1f, it becomes an intermediate seat state between all the flow paths, and when rotated approximately 180 degrees counterclockwise from FIG. 4, it becomes the same front seat state as in FIG. 6.

Furthermore, when the stem 2 is on the other side and viewed from the other side, the opening 1 in FIGS. 4 to 6 is counterclockwise.

If the upper outlet path la side opening of the through hole 5a in FIG.
1 closed.

In any case, the stem 2 can be rotated approximately 180 degrees to the left or right in a predetermined manner.

"Example" The present invention will be described in more detail below based on the drawings.

1 to 3 show an embodiment of the present invention when used in a refrigerant piping system.

A ball having a T-shaped through hole 5a in the storage chamber 1f of the valve W1, which has a service port 1b having an introduction path 4a and a service port flow path 1c at both ends of the T-shape, and a flow path having an outlet path 1a at the remaining upper end. The through hole 5a is connected to the introduction path 4.
a, the lead-out passage 1a, and the bottom wall at the lower end are held in an open back seat state, and the seat ring 3.3 is used to hold the seat ring 3. It is attached by pressing the body cap 4. The stem 2 is engaged with the engagement groove 5b on the front side wall of the ball 5, and the jaw 2
Stop the removal with a, fit a seal 6 to prevent leakage, and provide a slotted groove 2b for rotation with a flathead screwdriver.
A spring pin with a magic rotation angle or a stopper pin 12 made of wire or the like is press-fitted from the side. and,
A predetermined portion of the valve box 1 is a concave portion 1d, and the stopper bin 12 is angled at the side wall of the concave portion 1d. Further, a seal cap 11 having a seat portion 4b with an annular edge is screwed onto the valve body 1 of the stem 2 portion to prevent double wrapping. The service port 1b is also screwed with a flare nut 9 with a bowl-shaped cap 8 interposed therebetween to prevent double 11i from being scratched when in the backseat state. Also, the derivation path la
A 1° flare nut for fixing a copper connecting pipe with a flared end is screwed onto the side. Reference numeral 1e denotes a mounting hole for equipment provided in the mounting plate portion of the valve box 1. 4b is a seat part of an annular edge for preventing leakage provided on the body cap 4, and is sealed by the taper of the bottom part of the valve Wi 1171J. Note that a sealing agent may be applied to the screwed part of the body cap 4 to seal it. Then, by rotating the stem 2 approximately 180 degrees clockwise, the inlet path 4a and the outlet path 1a are connected to the 11
Note that the slot groove 2b of the stem 2 can be made into a two-sided shape, a square shape, etc., and can be rotated using a monkey key or a spanner. Note that the mounting plate portion with the mounting holes 1e for equipment may be formed separately by press molding, and this ball valve with a service port is installed at the refrigerant inlet or outlet of the outdoor unit of the air conditioner in the refrigerant piping system. The commercial value is high if it is used for one or both.

FIG. 7 shows another embodiment of the present invention. In this embodiment, the stem 2 of the above embodiment is provided on the same side wall of the ball 5, but in a symmetrical position. In this case, the counterclockwise rotation of the stem 2 has the same effect as in the above embodiment. Furthermore, the fifth
FIG. 8 shows still another embodiment of the present invention, which can be rotated clockwise if the upper outlet path la side opening of the through hole 5a in the figure faces the lower bottom wall. In this embodiment, connecting screws are provided in the inlet passage 4a and the outlet passage 1a, and the seat ring 3 is press-screwed with a washer-like body cap 4. Then, a commonly used handle 13 is fitted onto the stem 2, and the nut 14 is tightened.
It is screwed on. In this way, especially for liquefied petroleum gas and other fluids that do not require double leakage prevention,
Similar to the above embodiment, driftwood filling, pressure measurement, etc. can be performed at the service port 1b. As an example, an overflow prevention valve is built into the ball valve, and inert gas such as carbon dioxide or nitrogen is filled from the service port 1b in the front seat state as a gas exhaust valve for LP gas automobiles. ■, You can check for leaks in the piping from the P gas cylinder to the carburetor.

In addition, in the above embodiment, the body cap 4 can be a nipple-shaped body provided with the service port flow path 1c, and can be screwed onto the service port 1b side via the seat ring 3 instead of the introduction path side. .

Furthermore, the material for the seat ring 3 includes synthetic rubber, synthetic resin, and the like. And PTFE, fiberglass
TFE, carbon-containing PTFE, etc. are more effective.

"Effect of the invention" The advantages of the present invention are as follows.

As shown in the conventional example in FIG.
01a is straight, but when connecting to equipment, the tube 107, which is a rust pipe of 1!l, is mostly used by bending it into an L shape. The shape of the flow path makes it very compact.It also has a service port that combines the excellent functions of a ball valve and a stem-type packed valve that has three states: front seat, middle seat, and back seat. In addition, the service port 1b does not use a valve core, so if the size is the same, the flow path can be made larger, so the fluid filling speed is faster, and the valve can be opened and closed within one rotation by the stem 2. This eliminates the need for multiple rotations like with the valve stem type.It is especially effective for large valves.Also, since valve N1 is not brazed, there is no need to worry about thermal deformation, making it simple. It has a compact structure and significantly reduces manufacturing costs, and is expected to be used as a ball valve with a service port in all fields.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing one embodiment of the present invention, FIG. 2 is a bottom sectional view showing the same embodiment of the present invention, FIG. 3 is a front view showing the same embodiment of the present invention, and FIG. FIG. 6 is a partial front cross-sectional view showing the operating states of the back seat, middle seat, and front seat of the same embodiment of the present invention; FIG. 7 is a front view of another embodiment of the present invention; 1 is a partially sectional front view showing still another embodiment of the present invention, and FIGS. 9 and 10 are sectional views showing a conventional valve. l, 101--valve box, 1a, 1-01 a-outlet path,
1b, 101b...Service port. 1c, 101c...Service port flow path, lf, 10
1f...Storage room, 2,102-...Stem, 3.10
3...Seat ring, 4,104...Body cap, 4a, 104a...Introduction path, 4b...Seat portion, 5,105...Ball, 5a, 105a...Through hole, 5b ...Engagement groove. Patent applicant: Katsuhiro Hikasa, representative of Hikasa Giken Co., Ltd.

Claims (1)

[Claims] Both ends of the T shape are connected to the introduction path (4a) and the service port flow path (
A ball (1b) having a T-shaped through hole (5a) is located in a storage chamber (1f) of a valve box (1) consisting of a service port (1b) having a service port (1c) and a flow path whose remaining upper end is an outlet path (1a).
5) in an open state in which the through hole (5a) is engaged with the inlet path (4a), the outlet path (1a), and the bottom wall at the lower end, and the seat ring (3) is clamped and attached with the seat ring (3). and the ball (5
), the through hole (5a) engages the outlet path (1a), the service port flow path (1c), and the bottom wall by approximately 180 degree rotation of the stem (2) that engages one of the side walls of the Also, the ball valve with a service port is characterized in that the introduction path (4a) is in a closed state.